Weather Alerts for California

Recent Locations: Fernley, NV Alexandria, LA Coarsegold, CA

1. High Wind Warning for: Eastern Sierra Slopes of Inyo County; Owens Valley

2. Wind Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area

3. Wind Advisory for: Imperial County Southwest

4. Wind Advisory for: Indian Wells Valley; Mojave Desert Slopes; Mojave Desert

5. Wind Advisory for: Modoc County; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County

6. Wind Advisory for: Mono

7. Wind Advisory for: Northern Sacramento Valley; Central Sacramento Valley; Northeast Foothills/Sacramento Valley

8. Wind Advisory for: San Bernardino County Mountains; Riverside County Mountains; San Diego County Mountains; Apple and Lucerne Valleys; San Diego County Deserts; San Gorgonio Pass Near Banning

9. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range

10. Wind Advisory for: Surprise Valley California; Lassen-Eastern Plumas-Eastern Sierra Counties; Northern Washoe County

11. Wind Advisory for: White Mountains of Inyo County

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds